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Reducing Threading Dislocation In Gasb Epilayer Grown On Gaas Substrate For Photovoltaic And Thermophotovoltaic Application, Ahmad Mansoori 2019 University of New Mexico - Main Campus

Reducing Threading Dislocation In Gasb Epilayer Grown On Gaas Substrate For Photovoltaic And Thermophotovoltaic Application, Ahmad Mansoori

Optical Science and Engineering ETDs

GaSb based photovoltaic devices have been demonstrated on GaAs substrates by an inducing interfacial array of 90° misfit dislocations. Despite the beneficial qualities of the highly stable 90° misfit dislocation, there is a significant density of residual threading dislocations in the GaSb layer, resulting in the degradation of the electrical performance of such photovoltaic cells compared to lattice matched devices. We aim to reduce threading dislocation density by optimizing growth temperature and by using an AlSb dislocation filtering layer. The growth temperature optimization results in a reduction of the threading dislocation density to 1.3 × 108 cm−2. Adding ...


Too Agile? - Devops Software Development Challenges In A Military Environment, Burl T. Kenner III 2019 University of South Carolina

Too Agile? - Devops Software Development Challenges In A Military Environment, Burl T. Kenner Iii

Theses and Dissertations

Agile and DevOps software development processes now represent proven, commonly accepted models in commercial industry. For DoD military environments however, empowering teams of software developers and end user operators to build, test and release solutions without direct oversight and management of leadership is a brand new experience. In 2017, a DoD software acquisitions revolution occurred when approval was granted to scrap the former ineffective, cost prohibitive process and initiate the agile DevOps model. After one year since its introduction, this paper may represent the very first look at how well this nontraditional process is working out in a military command ...


Workforce Development Through Online Experiential Learning For Stem Education, Arefeh Mohammadi, Kevin Grosskopf, John Killingsworth 2019 University of Nebraska–Lincoln

Workforce Development Through Online Experiential Learning For Stem Education, Arefeh Mohammadi, Kevin Grosskopf, John Killingsworth

Architectural Engineering -- Faculty Publications

The U.S. workforce is increasingly comprised of older adults, women, and minorities who lack basic skills and are unable to acquire these skills through traditional educational and training programs. New approaches are needed to provide effective training to the adult learner and flexible support for nontraditional students who must balance work-life demands with limited educational opportunities. Contextualized teaching and learning (CTL) is a form of experiential learning that blends both basic skills and occupational training together in environments that allow students to relate subject matter to real-world situations. Virtual CTL environments can be created to better engage students, provide ...


Development Of A Framework To Support The Effective Adoption Of Bim In The Public Sector: Lessons For Ireland, Shiyao Kuang, Alan Hore, Barry McAuley, Roger West 2019 Technological University Dublin

Development Of A Framework To Support The Effective Adoption Of Bim In The Public Sector: Lessons For Ireland, Shiyao Kuang, Alan Hore, Barry Mcauley, Roger West

Conference papers

Building Information Modelling (BIM) has been formally adopted by many countries with the promise of creating greater economic, social and sustainability benefits. Several authors and institutions have presented alternative BIM policies and tactics which have been adopted by developed countries. However, there is evidence to indicate that BIM adoption theories are not well established and, in particular, the linkage between BIM public sector adoption strategy outcomes and their contribution to achieving Government policy objectives are underdeveloped. This paper will present the outcome of the first phase of a systematic literature review of published studies (including journal papers and noteworthy international ...


Computer Vision Machine Learning And Future-Oriented Ethics, Abagayle Lee Blank 2019 Seattle Pacific University

Computer Vision Machine Learning And Future-Oriented Ethics, Abagayle Lee Blank

Honors Projects

Computer Vision Machine Learning (CVML) in the application of facial recognition is currently being researched, developed, and deployed across the world. It is of interest to governments, technology companies, and consumers. However, fundamental issues remain related to human rights, error rates, and bias. These issues have the potential to create societal backlash towards the technology which could limit its benefits as well as harm people in the process. To develop facial recognition technology that will be beneficial to society in and beyond the next decade, society must put ethics at the forefront. Drawing on AI4People’s adaption of bioethics for ...


Machine Learning With Multi-Class Regression And Neural Networks: Analysis And Visualization Of Crime Data In Seattle, Erkin David George 2019 Seattle Pacific University

Machine Learning With Multi-Class Regression And Neural Networks: Analysis And Visualization Of Crime Data In Seattle, Erkin David George

Honors Projects

This article examines the implications of machine learning algorithms and models, and the significance of their construction when investigating criminal data. It uses machine learning models and tools to store, clean and analyze data that is fed into a machine learning model. This model is then compared to another model to test for accuracy, biases and patterns that are detected in between the experiments. The data was collected from data.seattle.gov and was published by the City of Seattle Data Portal and was accessed on September 17, 2018. This research will be looking into how machine learning models can ...


Evaluating The Potential For Renewable Energy Technology At Us Ski Resorts, Tyler Farrell 2019 Dartmouth College

Evaluating The Potential For Renewable Energy Technology At Us Ski Resorts, Tyler Farrell

ENGS 86 Independent Projects (AB Students)

The ski industry is one of the most at-risk industries as a result of climate change. Warming temperatures and decreasing snowfall are contributing to a decline in skier visitations, shorter seasons, and higher energy costs. Currently, only 3 of 478 ski resorts in the United States rely on 100% renewable energy sources. The intent of this paper is to understand what the issues and barriers are to renewable energy development at ski resorts, and what technologies are feasible and appropriate for this industry to develop. While the renewable energy industry faces many issues and barriers, the ski industry faces its ...


Transient Flow Analysis Of A Closing Blowout Preventer Using Computational Fluid Dynamics (Cfd), Daniel Barreca 2019 Louisiana State University

Transient Flow Analysis Of A Closing Blowout Preventer Using Computational Fluid Dynamics (Cfd), Daniel Barreca

LSU Master's Theses

Reliability of blowout preventers (BOPs) is crucial for drilling and production operations. Erosion of BOP components and hydrodynamic forces on rams may cause failure of BOP elements to seal the well. Transient computational fluid dynamics (CFD) simulations of fluids within the wellbore and BOP offer quantitative and qualitative data related to this reliability during the closure of various BOP components. Since limited research has been published in transient CFD simulations of closing BOPs, this thesis discusses challenges and solutions to simulating closing blowout preventers. Single component fluids are simulated through several BOP geometries such as annular preventers, pipe rams, and ...


Atx Storage: Fire And Life Safety Analysis, Perla Salcedo 2019 California Polytechnic State University, San Luis Obispo

Atx Storage: Fire And Life Safety Analysis, Perla Salcedo

Culminating Experience Project Reports in Fire Protection Engineering

The following report is a fire and hazard protection analysis of a new building. This new building is a self-storage building called ATX Storage locate in Austin, TX. The prescriptive requirements set by the codes and standards used at time of construction of the building have been met. The building has been properly classified with respect to occupancy as S1, Group B and R-3 and construction type II A Sprinklered. Appropriate design for interior partitions and exterior wall have been identified. Interior finish requirements have been analyzed for a better understanding of aesthetics guidelines. Based on the sprinkler drawing calculations ...


Cal Poly State University Robert E. Kennedy Library Fire Protection Analysis Report, Timothy Anderson 2019 California Polytechnic State University, San Luis Obispo

Cal Poly State University Robert E. Kennedy Library Fire Protection Analysis Report, Timothy Anderson

Culminating Experience Project Reports in Fire Protection Engineering

This report determines whether or not the fire protection and life safety features of Robert E. Kennedy Library are consistent with the fire protection objectives established in nationally recognized fire protection codes and standards. This analysis is performed to establish a technical baseline for identification of fire protection deficiencies.

Kennedy Library is the campus student library at California Polytechnic State University. The facility provides resources and services in a variety of media to meet the needs of university students and faculty.

This analysis consists of a prescriptive analysis and a performance-based analysis. The prescriptive analysis is an analysis of the ...


Fire Protection System Analysis Of Warren J. Baker Center Of Science And Mathematics, Jacob Dentici 2019 California Polytechnic State University, San Luis Obispo

Fire Protection System Analysis Of Warren J. Baker Center Of Science And Mathematics, Jacob Dentici

Culminating Experience Project Reports in Fire Protection Engineering

This report analyzes the different fire protection systems and features of the Warren J. Baker Center for Science and Mathematics at the California Polytechnic State University, San Luis Obispo campus. This building is used for lectures, laboratories, study spaces, faculty spaces, and storage spaces for the students and faculty at the Cal Poly campus. Typically, there are science and math courses taught within this building. The building is a 6-story structure, that is not classified as a high-rise due to the location of fire department access and has a five-story atrium located on levels 2 through 6. There are two ...


Silverton Timeshare Tower “The Berkley”, Kevin Murphy 2019 California Polytechnic State University, San Luis Obispo

Silverton Timeshare Tower “The Berkley”, Kevin Murphy

Culminating Experience Project Reports in Fire Protection Engineering

The Berkley (aka the Silverton Timeshare Tower) was reviewed for compliance with the code of record. This included review of the full architectural set of drawings, as well as the available Fire Protection Report and Amendments that were issued prior to and during construction. This analysis has been slowly performed throughout the extent of my graduate career at California Polytechnic State University, San Luis Obispo (Cal Poly), and has been in depth for each applicable area of study. Each of the studies performed will be reviewed in the applicable sections below, be it for prescriptive analysis of the existing facility ...


Fire Protection Engineering Final Report: Baylor Scott & White Medical Center, College Town, Tx, Jonathan Lo 2019 California Polytechnic State University, San Luis Obispo

Fire Protection Engineering Final Report: Baylor Scott & White Medical Center, College Town, Tx, Jonathan Lo

Culminating Experience Project Reports in Fire Protection Engineering

This report examines the Baylor, Scott & White Medical Center in College Station, TX. This hospital is a 324,070 square feet midrise building of Type I-A construction and Group I-2 occupancy, with a basement and five above-grade floors. Publicly-available, simplified floor plans were obtained from the internet, and a prescriptive- and performance-based analysis was formed around these plans. It should be noted that these online plans may not contain all information and details in that are found in architectural plans, and that assumptions were made in order to ‘fill in the gaps’ and proceed with this report. For example, on ...


Building V: Fire And Life Safety Analysis, Andrew Ko 2019 California Polytechnic State University, San Luis Obispo

Building V: Fire And Life Safety Analysis, Andrew Ko

Culminating Experience Project Reports in Fire Protection Engineering

A fire and life safety analysis was completed for Building V as part of a culminating project in the California Polytechnic State University at San Luis Obispo Fire Protection Engineering Master’s Degree Program. This report will detail both a prescriptive design based on the 2013 California Building Code and applicable standards as well as a performance based analysis based on a design fire scenario.

The prescriptive design will discuss four main components of compliance: 1) Structural Fire Protection, 2) Fire Alarm, 3) Fire Sprinkler, and 4) Means of Egress. Structural fire protection analysis is separated into four parts: type ...


Fire And Life Safety Analysis: Building 171a – Poly Canyon Village, Delaney Seeburger 2019 California Polytechnic State University, San Luis Obispo

Fire And Life Safety Analysis: Building 171a – Poly Canyon Village, Delaney Seeburger

Culminating Experience Project Reports in Fire Protection Engineering

A fire and life safety analysis was performed in fulfillment of one of the requirements for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University San Luis Obispo (Cal Poly). The analysis consisted of a prescriptive and a performance-based analysis. These analyses were performed on Building 171A which is part of the Cal Poly San Luis Obispo campus. The prescriptive analysis consisted of four distinct areas of focus: 1) Structural Fire Protection, 2) Water-Based Suppression Systems, 3) Fire Alarm and Detection Systems, 4) Egress Analysis and Design Prescriptive analyses are performed to determine whether a ...


Gaslamp Hotel-Fire Protection/Life Safety Analysis, Garner A. Palenske 2019 California Polytechnic State University, San Luis Obispo

Gaslamp Hotel-Fire Protection/Life Safety Analysis, Garner A. Palenske

Culminating Experience Project Reports in Fire Protection Engineering

The Gaslamp Hotel was analyzed for fire protection/life safety using two different methodologies; a prescriptive approach and a performance-based approach. Both considered the same features of the building. The prescriptive analyses studied the variation of the building’s fire protection/life safety components from those required by the applicable codes and standards. This included building construction, fire resistance, fire suppression, fire detection, smoke control system, and egress systems. The results of the analysis indicate that the building complies with the requirements of the applicable codes and standards, with three exceptions relating to occupant egress: 1) The first-floor bar area ...


An Experimental Study On The Impacts Of Using Multiple Pdc Cutters On Rock Cutting Process, Kian Sheikhrezaei 2019 Louisiana State University

An Experimental Study On The Impacts Of Using Multiple Pdc Cutters On Rock Cutting Process, Kian Sheikhrezaei

LSU Doctoral Dissertations

The ultimate goal in drilling in oil and gas applications is to improve the rate of penetration (ROP) and one important factor that affects the ROP enhancement is Drill Bit. Today, PDC bit plays a significant role in drilling all types of formations. Besides the material development, bit design or a way of cutters arrangements on a bit is a regular challenge for bit designers to improve the bit performance. This concept has been experimentally studied in this work.

Different sets of cutters arrangements containing three PDC cutters on a flat bit profile have been used to conduct a variety ...


Forward Osmosis Flow Rate Differential Using Different Osmotic Agents, John M. Trzinski 2019 Embry Riddle Aeronautical University

Forward Osmosis Flow Rate Differential Using Different Osmotic Agents, John M. Trzinski

Beyond: Undergraduate Research Journal

Life support is one of the most vital systems flown on manned spaceflight missions. The systems currently used are large, heavy, inefficient, and power consuming in an environment that requires nearly perfect conditions to function. Forward Osmosis (FO) is a form of filtration that uses the natural properties of water and concentration gradients to filter water without the need for any electricity. An experiment was conducted during the Embry Riddle Summer 2018 study abroad to the LUNARES research station in Piła, Poland. This experiment explored how the flow rate of water through a FO filtration system could be affected by ...


Network Traffic Behavioral Analytics For Detection Of Ddos Attacks, Alma D. Lopez, Asha P. Mohan, Sukumaran Nair 2019 Southern Methodist University

Network Traffic Behavioral Analytics For Detection Of Ddos Attacks, Alma D. Lopez, Asha P. Mohan, Sukumaran Nair

SMU Data Science Review

As more organizations and businesses in different sectors are moving to a digital transformation, there is a steady increase in malware, facing data theft or service interruptions caused by cyberattacks on network or application that impact their customer experience. Bot and Distributed Denial of Service (DDoS) attacks consistently challenge every industry relying on the internet. In this paper, we focus on Machine Learning techniques to detect DDoS attack in network communication flows using continuous learning algorithm that learns the normal pattern of network traffic, behavior of the network protocols and identify a compromised network flow. Detection of DDoS attack will ...


Design, Fabrication, And Characterization Of Multilayer Hyperbolic Metamaterials, James Dilts 2019 Rose-Hulman Institute of Technology

Design, Fabrication, And Characterization Of Multilayer Hyperbolic Metamaterials, James Dilts

Graduate Theses - Physics and Optical Engineering

Hyperbolic metamaterials (HMMs) show extreme anisotropy, acting as metals and dielectrics along orthogonal directions. They are designed using the effective medium theory (EMT) and can be fabricated using standard semiconductor processing techniques. Current techniques used to characterize the optical behavior of HMMs have a high complexity or are unable to robustly determine the complex permittivity tensor. We describe the details of a procedure to obtain a very low mean-squared-error (MSE) for extraction of permittivity from hyperbolic metamaterials using spectroscopic ellipsometry. We have verified our procedure by fabricating three different samples of various materials and fill factors designed to have a ...


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